Sari, Intan Kurnia, Joko Sutarto, and Lita Latiana. “The Implementation of Discovery Learning Assisted With Manipulative Teaching Tools on The Mathematical Understanding Concept of Students”. Journal of Primary Education 8, no. 7 (September 2, 2019): 1-10. Accessed April 27, 2024. https://journal.unnes.ac.id/sju/jpe/article/view/33821.